1/*
2 * Copyright 2010 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8
9#include "SkPDFFormXObject.h"
10#include "SkPDFUtils.h"
11
12sk_sp<SkPDFObject> SkPDFMakeFormXObject(std::unique_ptr<SkStreamAsset> content,
13                                        sk_sp<SkPDFArray> mediaBox,
14                                        sk_sp<SkPDFDict> resourceDict,
15                                        const SkMatrix& inverseTransform,
16                                        const char* colorSpace) {
17    auto form = sk_make_sp<SkPDFStream>(std::move(content));
18    form->dict()->insertName("Type", "XObject");
19    form->dict()->insertName("Subtype", "Form");
20    if (!inverseTransform.isIdentity()) {
21        sk_sp<SkPDFObject> mat(SkPDFUtils::MatrixToArray(inverseTransform));
22        form->dict()->insertObject("Matrix", std::move(mat));
23    }
24    form->dict()->insertObject("Resources", std::move(resourceDict));
25    form->dict()->insertObject("BBox", std::move(mediaBox));
26
27    // Right now FormXObject is only used for saveLayer, which implies
28    // isolated blending.  Do this conditionally if that changes.
29    // TODO(halcanary): Is this comment obsolete, since we use it for
30    // alpha masks?
31    auto group = sk_make_sp<SkPDFDict>("Group");
32    group->insertName("S", "Transparency");
33    if (colorSpace != nullptr) {
34        group->insertName("CS", colorSpace);
35    }
36    group->insertBool("I", true);  // Isolated.
37    form->dict()->insertObject("Group", std::move(group));
38    return form;
39}
40